diff options
| author | Kaixiong Yu <yukaixiong@huawei.com> | 2025-01-11 15:07:41 +0800 |
|---|---|---|
| committer | Joel Granados <joel.granados@kernel.org> | 2025-02-07 16:53:04 +0100 |
| commit | aacdde7202140c8aa4a7a600ad410b11af3b7e4f (patch) | |
| tree | 3b0acae86f0ff4362006f955382b58a051d22d17 /mm/mmap.c | |
| parent | b1e8d7134eb61677c8a3207004d1ce34305d1f35 (diff) | |
mm: mmap: move sysctl to mm/mmap.c
This moves all mmap related sysctls to mm/mmap.c, as part of the
kernel/sysctl.c cleaning, also move the variable declaration from
kernel/sysctl.c into mm/mmap.c.
Signed-off-by: Kaixiong Yu <yukaixiong@huawei.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index cda01071c7b1..d6bbe435bd99 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1543,6 +1543,57 @@ struct vm_area_struct *_install_special_mapping( &special_mapping_vmops); } +#ifdef CONFIG_SYSCTL +#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ + defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) +int sysctl_legacy_va_layout; +#endif + +static const struct ctl_table mmap_table[] = { + { + .procname = "max_map_count", + .data = &sysctl_max_map_count, + .maxlen = sizeof(sysctl_max_map_count), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + }, +#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ + defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) + { + .procname = "legacy_va_layout", + .data = &sysctl_legacy_va_layout, + .maxlen = sizeof(sysctl_legacy_va_layout), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + }, +#endif +#ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS + { + .procname = "mmap_rnd_bits", + .data = &mmap_rnd_bits, + .maxlen = sizeof(mmap_rnd_bits), + .mode = 0600, + .proc_handler = proc_dointvec_minmax, + .extra1 = (void *)&mmap_rnd_bits_min, + .extra2 = (void *)&mmap_rnd_bits_max, + }, +#endif +#ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS + { + .procname = "mmap_rnd_compat_bits", + .data = &mmap_rnd_compat_bits, + .maxlen = sizeof(mmap_rnd_compat_bits), + .mode = 0600, + .proc_handler = proc_dointvec_minmax, + .extra1 = (void *)&mmap_rnd_compat_bits_min, + .extra2 = (void *)&mmap_rnd_compat_bits_max, + }, +#endif +}; +#endif /* CONFIG_SYSCTL */ + /* * initialise the percpu counter for VM */ @@ -1552,6 +1603,9 @@ void __init mmap_init(void) ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL); VM_BUG_ON(ret); +#ifdef CONFIG_SYSCTL + register_sysctl_init("vm", mmap_table); +#endif } /* |